期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 868, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2021.159015
关键词
Fe-Nx-C; Huge specific surface area; Oxygen reduction; Acidic and alkaline media; Zn-air batteries
资金
- National Natural Science Foundation of China [21676202, 51603145, 21878231]
- Natural Science Foundation of Tianjin [19JCZDJC37300, 15JCZDJC37000]
- Jiangsu Key RD Plan [BE2018006-4]
- China Petroleum Chemical Co Technology Development Project [216090, 218008-6]
Decorating porous carbon nanomaterials with homodispersed metal cluster and heteroatoms can enhance the oxygen reduction reaction. The obtained hierarchical porous carbon nanorods exhibit excellent activity as ORR catalysts, with high power density and charge/discharge stability in both liquid and flexible solid Zn-air batteries.
Decorating porous carbon nanomaterials with rich homodispersed metal cluster and heteroatoms can effectively shorten the diffusion pathway of oxygen and expose more active sites, thereby promoting oxygen reduction reaction (ORR). Herein, hierarchical porous carbon nanorods with homodispersed Fe-Nx-C active sites are obtained by calcination, etching and ammonia activation of Fe-nitrogenous acid (NTA) coordination polymer nanowires. The obtained Fe-PCNRs-700 as ORR catalysts show the excellent activity with half wave potential (E-1/2) of 0.71 V vs. reversible hydrogen electrode (RHE) in 0.5 M H2SO4 and 0.87 V vs. RHE in 0.1 M KOH electrolyte, which owe to its huge specific surface area (1652 m(2) g(-1)), hierarchical pore structure, homodispersed Fe-Nx-C active sites and structural defects. Furthermore, using Fe-PCNRs-700 as a cathode catalyst in both liquid and flexible solid Zn-air batteries, and the assembled liquid batteries display the high power density of 161 mW cm(-2) and robust charge/discharge stability of 116 h. (C) 2021 Published by Elsevier B.V.
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